KR20110003629A - Mobile terminal with flexible printed circuit board - Google Patents

Abstract

The present invention relates to a portable terminal having a flexible printed circuit board. A portable terminal having a flexible printed circuit board according to an embodiment of the present invention includes a first main body portion having a first electronic circuit board mounted therein, a first main body portion movably connected thereto, and a second inside thereof. And a flexible printed circuit board (FPCB) for transmitting an electrical signal by electrically connecting the first body and the second electronic circuit board to which the electronic circuit board is mounted. The circuit board includes an FPCB connection part having a plurality of data lines, a power supply line, and a ground line therein, and a first connector formed at both ends of the FPCB connection part and connected to the first electronic circuit board and the second electronic circuit board, respectively. And a ground portion formed on the second connector and the FPCB connection portion between the first connector and the second connector and connected to the ground of the first electronic circuit board.

Description

TECHNICAL FIELD A mobile terminal having a flexible printed circuit board.

TECHNICAL FIELD The present invention relates to a portable terminal, and more particularly, to a portable terminal having a flexible printed circuit board.

In general, a mobile terminal is an electronic device that allows a user to freely use functions such as wireless communication, network connection, and digital broadcast reception regardless of time and place. Recently, portable terminals have been developed to perform not only communication functions but also Internet access, digital broadcast reception, document preparation, and games. In addition, in recent years, the portable terminal has been gradually miniaturized and slimmed with increasing functions in response to user demands.

An electronic circuit board having many electronic components mounted therein is attached to the inside of the portable terminal, and the electronic circuit board transmits and receives electrical signals to and from a functional module such as a display unit or a camera unit of the portable terminal. As portable terminals become smaller and smaller, flexible printed circuit boards (FPCBs) are used to connect electronic circuit boards and display units or camera units to transmit and receive electrical signals including various data. Done. In particular, in the case of a slide type portable terminal, the use of the FPCB can be said to be essential.

Recently, the portable terminal adopts a high specification display unit or a camera unit. Accordingly, the amount of data movement between the electronic circuit board and the display unit or the camera unit increases, while the operating frequency of the data extends to a high frequency region. Performance and electrostatic discharge (ESD) performance is seriously degraded. The FPCB only has a patterned ground line inside and is connected to the ground of the electronic circuit board only through the connectors formed at both ends, so that the ground between the display unit or the camera unit and the electronic circuit board cannot be sufficiently secured. There is a problem. In addition, since there is no path for bypassing noise and ESD surges that affect radiation performance separately, the FPCB itself has a very poor shielding effect of noise and ESD surges. In particular, there is a problem that the ESD surge directly affects the ground formed on the electronic circuit board, and thus, the peripheral electronic components are likely to be damaged.

In addition, in the case of a slide-type portable terminal, in order to connect the FPCB to the electronic circuit board, the sliding upper case must be assembled in a half-open state, which is not easy to assemble, and damage to the FPCB may occur. There is a problem.

Accordingly, there is a need for a portable terminal having a flexible printed circuit board that can facilitate assembly of the FPCB and improve the radiation performance and ESD performance of the portable terminal.

SUMMARY OF THE INVENTION The present invention has been devised to improve the above problems, and the problem to be solved by the present invention is a portable terminal having a flexible printed circuit board which can facilitate the assembly of the FPCB and improve the radiation performance and ESD performance of the portable terminal. To provide.

The technical problem of the present invention is not limited to those mentioned above, and another technical problem which is not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a portable terminal having a flexible printed circuit board according to an embodiment of the present invention, the first main body portion having a first electronic circuit board mounted therein, and the first main body portion is movable Flexible printed circuit board which is connected to the second body portion and the second electronic circuit board mounted therein and electrically connects the first electronic circuit board and the second electronic circuit board to transmit an electrical signal. Board, FPCB), the flexible printed circuit board, the FPCB connection portion having a plurality of data lines, power lines and ground lines therein, and formed on both ends of the FPCB connection portion, respectively, the first electronic circuit A first connector and a second connector connected to a substrate and the second electronic circuit board, and on the FPCB connection portion between the first connector and the second connector; 1 is characterized in that it comprises an electronic circuit unit connected to ground and the ground of the substrate.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the portable terminal having the flexible printed circuit board according to the exemplary embodiment of the present invention, the ground between the first electronic circuit board and the second electronic circuit board can be sufficiently secured by forming a separate ground part on the FPCB connection part. .

In addition, according to the mobile terminal having the flexible printed circuit board according to an embodiment of the present invention, the noise and the ESD surge transmitted through the FPCB can be bypassed to the ground of the first electronic circuit board through the ground portion, the noise and ESD The influence of the surge on the electronic components mounted on the first electronic circuit board can be minimized, and the radiation performance and the ESD performance of the portable terminal can be improved.

In addition, according to the mobile terminal having a flexible printed circuit board according to an embodiment of the present invention, the first connection portion of the FPCB connection portion is formed so that the first connector protrudes from one side of the lower case and the first electronic circuit board After attaching to the upper cover of the case, by connecting the first connector to the first electronic circuit board, the assembly of the FPCB can be facilitated regardless of the position according to the sliding movement of the upper case, and when the FPCB is installed in the mobile terminal, Damage due to bending and the like can be prevented and manufacturing time of the portable terminal can be reduced.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

In describing the embodiments, descriptions of technical contents which are well known in the technical field to which the present invention belongs and are not directly related to the present invention will be omitted. This is to more clearly communicate without obscure the subject matter of the present invention by omitting unnecessary description.

For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated. In addition, the size of each component does not fully reflect the actual size. The same or corresponding components in each drawing are given the same reference numerals.

Hereinafter, the present invention will be described with reference to the drawings for explaining a portable terminal having a flexible printed circuit board according to embodiments of the present invention.

Prior to the detailed description of the present invention, the following describes a mobile terminal according to an embodiment of the present invention as a mobile communication terminal for convenience of description, but the present invention is not limited thereto. That is, the portable terminal according to the embodiment of the present invention is a terminal having a portable terminal having a flexible printed circuit board, preferably, a mobile communication terminal, a mobile phone, a personal digital assistant (PDA), smart Smart Phone, IMT ?? 2000 (International Mobile Telecommunication 2000) terminal, Code Division Multiple Access (CDMA) terminal, Wideband Code Division Multiple Access (WCDMA) terminal, Global System for Mobile communication (GSM) terminal, General GPRS All information communication devices and multimedia devices, such as Packet Radio Service (EDGE) terminal, Enhanced Data GSM Evironment (EDGE) terminal, Universal Mobile Telecommunication Service (UMTS) terminal, Digital Broadcasting terminal, Automated Teller Machine (ATM), and the like, It will be apparent that the present invention can be applied to the application.

1 is a perspective view showing a portable terminal having a flexible printed circuit board according to an embodiment of the present invention, Figure 2 is an exploded view showing the structure of a portable terminal having a flexible printed circuit board according to an embodiment of the present invention Perspective view.

As shown in FIG. 1, a typical slide-type portable terminal 1 may include an upper case 10 including a display unit 11 and a lower case 20 including a key input unit 21 on a front surface thereof. Can be. The upper case 10 may move upward and downward by sliding on the lower case 20.

The display unit 11 may serve as a user interface that outputs a desired screen to the user or receives a command from the user. The display unit 11 may be a liquid crystal display (LCD), organic light emitting diodes (OLED), or the like.

The upper surface of the lower case 20 may be formed with a key input unit 21 for receiving an operation command from the user, the upper case 10 is moved by sliding to move away from the lower case 20 may be exposed to the outside. have. The key input unit 21 may be implemented in the form of a key pad or a key button.

Meanwhile, FIG. 1 illustrates an example in which an auxiliary key input unit 12 that receives an operation command from a user is formed at a lower end of the upper case 10, that is, at a lower end of the display unit 11. The entire upper surface may be formed of the display unit 11. The auxiliary key input unit 12 may be formed at a lower end or side surface of the upper case 10, and when the upper case 10 and the lower case 20 are combined, the auxiliary key input unit 12 may receive power from the user of the portable terminal 1. It may consist of a minimum of function keys such as a power key for on / off, a call key for a call with a counterpart, a direction key for selecting menus displayed on the display unit 11, and the like.

As shown in FIG. 1, the portable terminal 1 includes a receiver 13 provided at an upper end of the upper case 10 to output a voice signal, and a talker provided at an lower end of the lower case 20 to input a voice signal. 22 may be provided. The user may listen to the voice signal received from the other party by putting the receiver 13 on his or her ear, and may transmit the voice signal to the other party by speaking to the talker 22. In addition, the portable terminal 1 may include a camera unit 14 for photographing a subject in front of the upper case 10 or making a video call. In addition, the portable terminal 1 may include an antenna unit (not shown) for transmitting and receiving wireless signals at the lower end of the lower case 20.

On the other hand, between the upper case 10 and the lower case 20 may include a sliding hinge 30 for guiding the upper case 10 to slide and move on the lower case 20. As shown in FIG. 2, the sliding hinge 30 has a first sliding member 31 connected to the lower surface of the upper case 10 and a second sliding member 32 connected to the upper surface of the lower case 20. ) And a hinge portion 33 installed between the first sliding member 31 and the second sliding member 32. An opening 34 may be formed in the first sliding member 31 or the second sliding member 32 to allow a flexible printed circuit board (FPCB) 100 to be described later to pass therethrough. In order to guide the sliding movement of the upper case 10, both side surfaces of the first sliding member 31 are provided with protrusions formed along the moving direction of the upper case 10, and both side surfaces of the second sliding member 32. The groove 32b that is elongated to insert the protrusion 31a of the first sliding member may be provided. The hinge part 33 may include an elastic member such as a compression spring that provides an elastic force to allow the upper case 10 to slide and move automatically or semi-automatically according to its position. The structure of the sliding hinge 30 shown in FIG. 2 is exemplary and is not limited thereto, and may be changed by those skilled in the art.

Meanwhile, the first electronic circuit board 23 may be mounted inside the lower case 20, and the second electronic circuit board 15 may be mounted inside the upper case 10. Various functional modules such as the display unit 11 and the camera unit 14 included in the upper case 10 are electrically connected to the second electronic circuit board 15 mounted in the upper case 10. It may be controlled by receiving an electrical signal from the first electronic circuit board 23 mounted in the 20). The first electronic circuit board 23 and the second electronic circuit board 15 may have a substantially thin plate shape, and may include various electronic components on the upper surface thereof and wires connecting them. The electronic component may mean various kinds of devices such as a modem chip. Preferably, the first electronic circuit board 23 and the second electronic circuit board 15 may use a printed circuit board (PCB). Although not shown, a noise blocking unit such as a shield can may be installed in the first electronic circuit board 23 or the second electronic circuit board 15 to shield noise generated from the electronic components. have. Here, the noise is noise generated when data is transmitted from the display unit 11 or the camera unit 14, noise caused by a power source, radiated from an antenna unit (not shown) and coupled to the upper case 10. And the like may mean noise emitted.

As described above, various functional modules such as the display unit 11 and the camera unit 14 connected to the second electronic circuit board 15 may be controlled by receiving electrical signals from the first electronic circuit board 23. A flexible printed circuit board (FPCB) 100 may be used to connect the first electronic circuit board 23 and the second electronic circuit board 15 to transmit and receive various electrical signals.

Hereinafter, the flexible printed circuit board 100 according to an exemplary embodiment of the present invention will be described with reference to FIGS. 3 to 5.

3 is a plan view illustrating a structure of a flexible printed circuit board in a mobile terminal having a flexible printed circuit board according to an embodiment of the present invention, and FIG. 4 is provided with a flexible printed circuit board according to an embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating a structure of a flexible printed circuit board in a portable terminal, and FIG. 5 is a side view illustrating a state in which a flexible printed circuit board is installed in a portable terminal having a flexible printed circuit board according to an exemplary embodiment of the present invention.

As illustrated in FIG. 3, the flexible printed circuit board may include an FPCB connection unit 110, a first connector 120, a second connector 130, and a ground unit 140. FIG. 4 shows a cross section A-A 'in FIG.

The FPCB connection unit 110 is a part constituting the body of the FPCB 100, and may have a form of a flexible printed circuit in which a fine circuit is printed on a thin plastic film. The FPCB connector 110 may include a plurality of data lines, a power line, and a ground line (not shown) therein, and may have a cross section formed of a plurality of layers. The FPCB connector 110 may serve as a communication path connecting the first electronic circuit board 23 and the second electronic circuit board 15 to transmit and receive power, various control signals, and data signals. The data line, power line, and ground line of the FPCB connector 110 may be formed of a copper conductor. Both ends of the ground line of the FPCB connector 110 may be connected to the ground of the first electronic circuit board 23 and the ground of the second electronic circuit board 15, respectively. The FPCB connection unit 110 may be implemented in various ways depending on the conditions of use and the cross-sectional structure thereof is well known, and thus detailed description thereof will be omitted.

The first connector 120 and the second connector 130 are formed at both ends of the FPCB connector 110 and may be connected to the first electronic circuit board 23 and the second electronic circuit board 15, respectively. Although not shown, the first connector 120 and the second connector 130 may each include a header and a socket including a plurality of terminals. EMI coating may be applied to the first connector 120 and the second connector 130 to minimize the effects of static electricity when the first connector 120 and the second connector 130 are coupled to the first electronic circuit board 23 and the second electronic circuit board 15. .

The ground unit 140 may be formed on the FPCB connection unit 110 between the first connector 120 and the second connector 130 and may be connected to the ground (not shown) of the first electronic circuit board 23. . As shown in FIG. 4, the ground unit 140 may include an upper ground layer 141 and a lower ground layer 142 formed of a copper foil coating layer on the upper and lower surfaces of the FPCB connection unit 110, respectively. In addition, the upper ground layer 141, the ground line of the FPCB connector 110, and the lower ground layer 142 may be connected through a plurality of via holes 143. The plurality of via holes 143 are connected to the ground lines of the FPCB connection unit 110. It may be formed through the upper ground layer 141 and the lower ground layer 142 formed on the upper and lower surfaces of the FPCB connector 110, the upper ground layer 141, the FPCB connector through the metal filling therein The ground line 110 and the lower ground layer 142 may be electrically connected to each other. Accordingly, noise and ESD surges transmitted through the FPCB 100 may be diverted to the ground of the first electronic circuit board 23. The shape and arrangement of the plurality of via holes 143 shown in FIG. 3 are exemplary and may be changed by those skilled in the art.

As such, by forming a separate ground part 140 on the FPCB connection part 110, it is possible to sufficiently secure the ground between the first electronic circuit board 23 and the second electronic circuit board 15. In addition, since the noise and ESD surge transmitted through the FPCB 100 may be diverted to the ground of the first electronic circuit board 23 through the ground unit 140, the noise and the ESD surge may be diverted to the first electronic circuit board 23. The influence on the electronic components mounted on the top can be minimized, and the radiation performance and the ESD performance of the portable terminal 1 can be improved.

As shown in FIG. 5, the ground part 140 is positioned between the upper cover 20a of the lower case 20 and the first electronic circuit board 23, and the upper cover 20a of the lower case 20. Can be attached to the back of the. In addition, the ground unit 140 may contact the ground formed on one surface of the first electronic circuit board 23 when attached to the rear surface of the upper cover 20a of the lower case 20. Preferably, the ground portion 140 may be attached to the rear surface of the upper cover 20a of the lower case 20 using the conductive tape 140a.

As illustrated in FIG. 3, the FPCB connection unit 110 includes a first connector 110a and a second connector 130 between the first connector 120 and the ground unit 140 with respect to the ground unit 140. ) And the second connection part 110b between the ground part 140, and the first connection part 110a has a ground part 140 on the rear surface of the upper cover 20a of the lower case 20. When attached, the first connector 120 may be formed to protrude from one side of the lower case 20. Due to this structure, the ground portion 140 of the FPCB 100 is attached to the rear surface of the upper cover 20a of the lower case 20, and the first electronic circuit board 23 is attached to the upper cover of the lower case 20. After mounting on 20a, the first connector 120 may be connected to the first electronic circuit board 23. The first connector 120 may be connected to the first electronic circuit board 23 through the connection part 23a provided on the side opposite to the one surface of the first electronic circuit board 23 that the ground part 140 contacts. As such, the first connector 110a of the FPCB connector 110 is formed such that the first connector 120 protrudes from one side of the lower case 20 and the first electronic circuit board 23 is the lower case 20. The first connector 120 to the first electronic circuit board 23 after mounting the upper cover 20a of the FPCB 100 regardless of the position according to the sliding movement of the upper case 10. Can be facilitated, damages due to bending or the like when the FPCB 100 is installed in the portable terminal 1 can be prevented, and manufacturing time of the portable terminal 1 can be reduced. This will be described later in detail with reference to FIGS. 6A and 6B.

Preferably, as shown in FIG. 3, the first connecting portion 110a may be formed perpendicular to the second connecting portion 110b. In this case, when the FPCB 100 is installed in the mobile terminal 1 and connects the first electronic circuit board 23 and the second electronic circuit board 15, the FPCB 100 is mounted on the upper cover 20a of the lower case 20. The first connection part 110a may be disposed along the width direction of the mobile terminal 1, and the second connection part 110b may be disposed along the length direction of the mobile terminal 1. have. Therefore, when the ground part 140 is attached to the rear surface of the upper cover 20a of the lower case 20, the first connector 120 may protrude from one side of the lower case 20.

Meanwhile, FIG. 3 illustrates an example in which the first connection part 110a and the second connection part 110b of the FPCB connection part 110 are formed vertically, but as an example, the first connection part 110a and the second connection part ( 110b) may be formed to be located in a straight line. For example, when the antenna unit (not shown) of the portable terminal 1 is installed at a position other than the lower end of the lower case 20 so that space can be secured at the lower end of the lower case 20, The second connector 110b may be formed so that the second connector 130 may protrude from the lower end of the portable terminal 1. As described above, the shape of the FPCB connection unit 110 may be changed depending on the size or mounting position of the electronic circuit board and the mounting position of the peripheral electronic components such as the antenna unit.

Hereinafter, a process of assembling the FPCB 100 into the mobile terminal 1 will be described with reference to FIGS. 6A and 6B.

6A and 6B are views illustrating a method of assembling a flexible printed circuit board in a mobile terminal having a flexible printed circuit board according to an embodiment of the present invention.

6A and 6B illustrate a state in which the display unit 11 of the portable terminal 1 is downward and the lower covers 20b and 20b of the lower case 20 are removed for convenience of description. First, although not shown, the second connector 130 of the FPCB 100 is connected to the second electronic circuit board 15 mounted on the upper case 10, and the second connection part 110b is connected to the sliding hinge 30. And through the opening formed in the upper cover (20a) of the lower case 20, the ground portion 140 may be located on the rear of the upper cover (20a) of the lower case (20). 6A, one surface of the ground part 140 may be attached to the rear surface of the upper cover 20a of the lower case 20 using a conductive tape 140a provided in advance. 6B, the FPCB 100 is attached to the rear surface of the upper cover 20a of the lower case 20 and the first electronic circuit board 23 is attached to the upper cover of the lower case 20. It can attach to 20a. In this case, the ground 140 of the FPCB 100 may be in contact with the ground formed on one surface of the first electronic circuit board 23, and the first connector 120 may protrude through the side of the lower case 20. Can be. Finally, the first connector 120 may be connected to the connection part 23a provided on the opposite side of one surface of the first electronic circuit board 23 to which the ground part 140 contacts.

As described above, according to the portable terminal 1 having the flexible printed circuit board according to the exemplary embodiment of the present invention, the first electronic circuit board is formed by forming a separate ground part 140 on the FPCB connection part 110. The ground between the 23 and the second electronic circuit board 15 can be sufficiently secured. In addition, since the noise and ESD surge transmitted through the FPCB 100 may be diverted to the ground of the first electronic circuit board 23 through the ground unit 140, the noise and the ESD surge may be diverted to the first electronic circuit board 23. The influence on the electronic components mounted on the top can be minimized, and the radiation performance and the ESD performance of the portable terminal 1 can be improved. In addition, the first connector 110a of the FPCB connector 110 is formed such that the first connector 120 protrudes from one side of the lower case 20 and the first electronic circuit board 23 of the lower case 20 is formed. After mounting the upper cover 20a, the first connector 120 is connected to the first electronic circuit board 23 to thereby assemble the FPCB 100 regardless of the position due to the sliding movement of the upper case 10. When the FPCB 100 is installed in the portable terminal 1, damage due to bending or the like can be prevented, and the manufacturing time of the portable terminal 1 can be reduced.

As described above, in the present invention, the slide type portable terminal 1 is described as an example, but the form of the portable terminal is not limited thereto. That is, the present invention provides a first electronic circuit board and a second electronic device such as a slide type portable terminal, a folder type portable terminal, a rotating type portable terminal, or a combination type thereof. The present invention can also be applied to various types of portable terminals using FPCBs for connecting circuit boards.

On the other hand, in the present specification and drawings have been described with respect to preferred embodiments of the present invention, although specific terms are used, it is merely used in a general sense to easily explain the technical details of the present invention and to help the understanding of the invention, It is not intended to limit the scope of the invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

1 is a perspective view illustrating a mobile terminal having a flexible printed circuit board according to an embodiment of the present invention.

2 is an exploded perspective view illustrating a structure of a mobile terminal having a flexible printed circuit board according to an embodiment of the present invention.

3 is a plan view illustrating a structure of a flexible printed circuit board in a mobile terminal having a flexible printed circuit board according to an exemplary embodiment of the present invention.

4 is a cross-sectional view illustrating a structure of a flexible printed circuit board in a mobile terminal having a flexible printed circuit board according to an exemplary embodiment of the present invention.

5 is a side view illustrating a state in which a flexible printed circuit board is installed in a mobile terminal having a flexible printed circuit board according to an exemplary embodiment of the present invention.

6A and 6B are views illustrating a method of assembling a flexible printed circuit board in a mobile terminal having a flexible printed circuit board according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: mobile terminal 10: upper case

11: display unit 12: auxiliary key input unit

13: receiver 14: camera

15: second electronic circuit board

20: lower case 21: key input unit

22: transmitter section 23: first electronic circuit board

30: sliding hinge 31: first sliding member

32: second sliding member 33: hinge portion

100: FPCB 110: FPCB connection

120: first connector 130: second connector

140: ground portion 141: upper ground layer

142: lower ground layer 143: via hole

Claims (8)

A first body part having a first electronic circuit board mounted therein; A second main body part movably connected to the first main body part and having a second electronic circuit board mounted therein; And And a flexible printed circuit board (FPCB) for electrically connecting the first electronic circuit board and the second electronic circuit board to transmit an electrical signal. The flexible printed circuit board, An FPCB connector including a plurality of data lines, power lines, and ground lines therein; First and second connectors formed at both ends of the FPCB connection unit and connected to the first electronic circuit board and the second electronic circuit board, respectively; And And a ground portion formed on the FPCB connection portion between the first connector and the second connector, the ground portion being connected to the ground of the first electronic circuit board. The method of claim 1, And the ground part includes a top ground layer and a bottom ground layer formed of copper foil coating layers on upper and lower surfaces of the FPCB connection unit, respectively. The method of claim 2, And the upper ground layer, the ground line of the FPCB connector, and the lower ground layer are connected through a plurality of via holes having metal filling therein. The method of claim 1, The ground portion is positioned between the upper cover of the first body portion and the first electronic circuit board, is attached to the rear surface of the upper cover of the first body portion, the contact with the ground formed on one surface of the first electronic circuit board A portable terminal having a flexible printed circuit board, characterized in that. The method of claim 4, wherein And the ground part is attached to the rear surface of the upper cover of the first body part using a conductive tape. The method of claim 4, wherein The first connector between the first connector and the ground portion of the FPCB connecting portion has the first connector protruding from one side of the first body portion when the ground portion is attached to the rear surface of the upper cover of the first body portion. A portable terminal having a flexible printed circuit board, characterized in that formed so as to. The method of claim 6, And the first connector is connected to the first electronic circuit board via a connection part provided on an opposite side of one surface of the first electronic circuit board to which the ground part contacts. The method of claim 7, wherein And the first connection part of the FPCB connection part is formed perpendicular to the second connection part between the second connector and the ground part.

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